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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
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 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8042251
 * @summary Test that outer_class_info_index of local and anonymous class is zero.
 * @library /tools/lib /tools/javac/lib ../lib
 * @modules jdk.compiler/com.sun.tools.javac.api
 *          jdk.compiler/com.sun.tools.javac.main
 * @build toolbox.ToolBox InMemoryFileManager TestResult TestBase
 * @run main InnerClassesIndexTest
 */

import java.lang.classfile.*;
import java.lang.classfile.attribute.*;
import java.lang.classfile.constantpool.ClassEntry;
import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.stream.Collectors;


public class InnerClassesIndexTest extends TestResult {

    public static void main(String[] args) throws TestFailedException {
        new InnerClassesIndexTest().test();
    }

    private boolean isExcluded(String className) {
        return !className.startsWith(InnerClassesIndexTest.class.getName())
                || "InnerClassesIndexTest$Inner".equals(className);
    }

    private Set<String> getInnerClasses() {
        FilenameFilter filter = (dir, name) -> name.matches("InnerClassesIndexTest\\$.*\\.class");
        return Arrays.stream(Objects.requireNonNull(getClassDir().listFiles(filter)))
                .map(File::getName)
                .map(s -> s.replace(".class", ""))
                .collect(Collectors.toSet());
    }

    public void test() throws TestFailedException {
        try {
            addTestCase("Source is InnerClassesIndexTest.java");
            ClassModel classFile = readClassFile(InnerClassesIndexTest.class);
            InnerClassesAttribute attr = classFile.findAttribute(Attributes.innerClasses()).orElse(null);

            Set<String> foundClasses = new HashSet<>();
            assert attr != null;
            for (InnerClassInfo info : attr.classes()) {
                String innerName = info.innerClass().asInternalName();
                echo("Testing class : " + innerName);
                if (isExcluded(innerName)) {
                    echo("Ignored : " + innerName);
                    continue;
                }
                foundClasses.add(innerName);
                ClassEntry out = info.outerClass().orElse(null);
                checkEquals(out == null? 0: out.index(), 0,
                        "outer_class_info_index of " + innerName);
                if (innerName.matches("\\$\\d+")) {
                    checkEquals(Objects.requireNonNull(info.innerName().orElse(null)).index(), 0,
                            "inner_name_index of anonymous class");
                }
            }
            Set<String> expectedClasses = getInnerClasses();
            expectedClasses.remove("InnerClassesIndexTest$Inner");
            checkEquals(foundClasses, expectedClasses, "All classes are found");
        } catch (Exception e) {
            addFailure(e);
        } finally {
            checkStatus();
        }
    }

    static class Inner {
    }

    Inner inner1 = new Inner() {
    };

    static Inner inner2 = new Inner() {
    };

    Runnable r = () -> {
        class Local {
        }
        new Local() {
        };
    };

    public void local() {
        class Local {
        }
        new Local() {
        };
    }

    public InnerClassesIndexTest() {
        class Local {
        }
        new Local() {
        };
    }

    {
        class Local {
        }
        new Local() {
        };
    }

    static {
        class Local {
        }
        new Local() {
        };
    }
}